ThreadsMonitorProbe.java

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package com.sun.tools.visualvm.modules.tracer.monitor;

import com.sun.tools.visualvm.application.jvm.Jvm;
import com.sun.tools.visualvm.application.jvm.MonitoredData;
import com.sun.tools.visualvm.modules.tracer.ItemValueFormatter;
import com.sun.tools.visualvm.modules.tracer.ProbeItemDescriptor;
import com.sun.tools.visualvm.modules.tracer.TracerProbeDescriptor;
import javax.swing.Icon;

/**
 *
 * @author Jiri Sedlacek
 */
class ThreadsMonitorProbe extends MonitorProbe {
    
    private static final String NAME = "Threads";
    private static final String DESCR = "Monitors number of threads running in the JVM.";
    private static final int POSITION = 50;


    ThreadsMonitorProbe(MonitoredDataResolver resolver) {
        super(2, createItemDescriptors(), resolver);
    }


    long[] getValues(MonitoredData data) {
        return new long[] {
            data.getThreadsLive(),
            data.getThreadsDaemon()
        };
    }


    static final TracerProbeDescriptor createDescriptor(Icon icon, boolean available,
                                                        Jvm jvm) {
        return new TracerProbeDescriptor(NAME, DESCR, icon, POSITION, available &&
                                         jvm.isThreadMonitoringSupported());
    }
    
    private static final ProbeItemDescriptor[] createItemDescriptors() {
        return new ProbeItemDescriptor[] {
            ProbeItemDescriptor.discreteLineItem("Live",
                    "Monitors total number of live Threads in the JVM",
                    ItemValueFormatter.DEFAULT_DECIMAL, 1d, 0, 3),
            ProbeItemDescriptor.discreteLineItem("Daemon",
                    "Monitors number of live daemon Threads in the JVM",
                    ItemValueFormatter.DEFAULT_DECIMAL, 1d, 0, 3)
        };
    }

}